JSON.parseObject将字符串转为bean对象

JSON.parseObject，是将Json字符串转化为相应的对象；JSON.toJSONString则是将对象转化为Json字符串。

String sb=

{"message":"success","store":false,"redirect":"","term":[{"index":0,"term":"华为"},{"index":1,"term":"手机"}],"central":{"index":1,"type":"pmc","value":"手机"},"res":[{"value":"华为","index":"0","type":"pmb"},{"value":"手机","index":"1","type":"pmc"}],"brand":{"brandError":false,"brandRelationHas":false,"familyBrand":false,"hasBrand":true,"luceneBrand":false,"pmbIndex":-1,"pureBrand":false},"relate":{"pmb":[],"cen":[{"extension":0,"extensionV2":"手机通讯","field":"groupIDCombination","id":"20006","similarity":0.9919,"value":"手机"}]},"info":[[{"extension":0,"extensionV2":"","field":"brand_Name","id":"0864","similarity":1.0,"value":"华为(HUAWEI)"},{"extension":0,"extensionV2":"手机通讯","field":"groupIDCombination","id":"20006","similarity":0.9919,"value":"手机"}]],"entities":[{"entities":[{"extension":0,"extensionV2":"","field":"brand_Name","id":"0864","similarity":1.0,"value":"华为(HUAWEI)"},{"extension":0,"extensionV2":"手机通讯","field":"groupIDCombination","id":"20006","similarity":0.9919,"value":"手机"}],"score":100.0}],"rec":[[{"extension":0,"extensionV2":"","field":"brand_Name","id":"0864","similarity":1.0,"value":"华为(HUAWEI)"}],[{"extension":0,"extensionV2":"手机通讯","field":"groupIDCombination","id":"20006","similarity":0.9919,"value":"手机"}],[]],"label":[[{"extension":0,"extensionV2":"","field":"brand_Name","id":"0864","similarity":1.0,"value":"华为(HUAWEI)"}],[{"extension":0,"extensionV2":"手机通讯","field":"groupIDCombination","id":"20006","similarity":0.9919,"value":"手机"}],[]]}

QueryResultBean queryResultBean = JSON.parseObject(sb.trim(), QueryResultBean.class);

将上面的json转为bean对象后可以直接获取

modelMap.put("term", queryResultBean.toTermStr());

 modelMap.put("info", queryResultBean.toInfoStr());

结果为：

{term=华为 手机 , info=brand_Name:华为(HUAWEI) groupIDCombination:手机}

关键在Bean中的写法，决定输出结果的格式：

1、QueryResultBean.java

public class QueryResultBean {

    private List<TermBean> term = new ArrayList<TermBean>();

    

    private List<List<GeneralEntity>> info = new ArrayList<List<GeneralEntity>>();

    

   

    public List<TermBean> getTerm() {

        return term;

    }

    public void setTerm(List<TermBean> term) {

        this.term = term;

    }

    public List<List<GeneralEntity>> getInfo() {

        return info;

    }

    public void setInfo(List<List<GeneralEntity>> info) {

        this.info = info;

    }

    public String toTermStr() {

        StringBuilder t = new StringBuilder();

        for (TermBean termBean : term) {

            t.append(termBean.getTerm()).append(" ");

        }

        return t.toString();

    }

    public String toInfoStr() {

        StringBuilder sBuilder = new StringBuilder();

        for (List<GeneralEntity> list : info) {

            for (GeneralEntity infoBean : list) {

                sBuilder.append(infoBean.field).append(":").append(infoBean.getValue()).append(" ");

            }

            sBuilder.append("\r\n");

        }

        return sBuilder.toString();

    }

}

2、TermBean.java

public class TermBean {

    private Integer index;

    private String term;

    

    public TermBean() {

    }

    public TermBean
4000
(Integer index, String term) {

        this.index = index;

        this.term = term;

    }

    public Integer getIndex() {

        return index;

    }

    public void setIndex(Integer index) {

        this.index = index;

    }

    public String getTerm() {

        return term;

    }

    public void setTerm(String term) {

        this.term = term;

    }

}

3、通用实体GeneralEntity.java

import java.io.Serializable;

import java.math.BigDecimal;

import java.util.Comparator;

/**

 * 通用实体

 */

public class GeneralEntity implements Serializable {

    private static final long serialVersionUID = 4020348283149544060L;

    public String id = "0";//实体id

    public String field = "";//具体领域

    public String value = "";//领域值

    public double similarity = 0;//相似度

    public int extension = 0;//扩展字段（int，精排黑名单等）

    public String extensionV2 = "";//扩展字段（String）

    public GeneralEntity() {

    }

    public GeneralEntity(String field, String value, int extension) {

        this.field = field;

        this.value = value;

        this.extension = extension;

    }

    public GeneralEntity(String id, String field, String value, double similarity, String extensionV2) {

        this.id = id;

        this.field = field;

        this.value = value;

        BigDecimal b = new BigDecimal(similarity);

        this.similarity = b.setScale(4, BigDecimal.ROUND_HALF_UP).doubleValue();

        this.extensionV2 = extensionV2;

    }

    public GeneralEntity(String id, String field, String value, double similarity, int extension, String extensionV2) {

        this.id = id;

        this.field = field;

        this.value = value;

        BigDecimal b = new BigDecimal(similarity);

        this.similarity = b.setScale(4, BigDecimal.ROUND_HALF_UP).doubleValue();

        this.extension = extension;

        this.extensionV2 = extensionV2;

    }

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    public String getField() {

        return field;

    }

    public void setField(String field) {

        this.field = field;

    }

    public String getValue() {

        return value;

    }

    public void setValue(String value) {

        this.value = value;

    }

    public int getExtension() {

        return extension;

    }

    public void setExtension(int extension) {

        this.extension = extension;

    }

    public String getExtensionV2() {

        return extensionV2;

    }

    public void setExtensionV2(String extensionV2) {

        this.extensionV2 = extensionV2;

    }

    public double getSimilarity() {

        return similarity;

    }

    public void setSimilarity(double similarity) {

        BigDecimal b = new BigDecimal(similarity);

        this.similarity = b.setScale(4, BigDecimal.ROUND_HALF_UP).doubleValue();

    }

    public static class AzComparator implements Comparator<GeneralEntity> {

        @Override

        public int compare(GeneralEntity a1, GeneralEntity a2) {

            return Double.compare(a2.similarity, a1.similarity);

        }

    }

    @Override

    public int hashCode() {

        final int prime = 100;

        int res = 1;

        res = prime * res + ((id == null) ? 0 : id.hashCode());

        res = prime * res + ((field == null) ? 0 : field.toLowerCase().hashCode());

        res = prime * res + ((value == null) ? 0 : value.hashCode());

        return res;

    }

    @Override

    public boolean equals(Object obj) {

        GeneralEntity entity;

        if (obj instanceof GeneralEntity) {

            entity = (GeneralEntity) obj;

        } else {

            return false;

        }

        return entity.id != null && entity.id.equals(this.id) && entity.field.equals(this.field) && entity.value.equals(this.value);

    }

}